US4485483A - FM Stereophonic system incorporating companding of difference signal - Google Patents
FM Stereophonic system incorporating companding of difference signal Download PDFInfo
- Publication number
- US4485483A US4485483A US06/476,738 US47673883A US4485483A US 4485483 A US4485483 A US 4485483A US 47673883 A US47673883 A US 47673883A US 4485483 A US4485483 A US 4485483A
- Authority
- US
- United States
- Prior art keywords
- signal
- difference signal
- frequency
- receiver
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000969 carrier Substances 0.000 claims abstract 17
- 230000005540 biological transmission Effects 0.000 claims description 34
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000005236 sound signal Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
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- 238000004891 communication Methods 0.000 description 2
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- 238000013475 authorization Methods 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive loop type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
- H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
Abstract
Description
f(t)=M+p sin ω/2 t+S sin ωt Eq. (1)
e.sub.m =M+p sin ω/2 t+S sin ωt Eq. (2)
e.sub.m =M+p sin ω/2 t+S sin ωt+S' cos ωt Eq. (3)
______________________________________ Modulating Transmission Receiver State Signal Mode Monophonic Biphonic C-Biphonic ______________________________________ L + R Monophonic 0 N.A. N.A. Only Biphonic 0.92 23.11 N.A. C-Biphonic 0.92 23.11 0.92 L (or R) Monophonic 0 N.A. N.A. Only Biphonic 6.94 26.12 N.A. C-Biphonic 8.58 27.76 8.58 ______________________________________
Claims (20)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/476,738 US4485483A (en) | 1983-03-18 | 1983-03-18 | FM Stereophonic system incorporating companding of difference signal |
JP59501292A JPS60500933A (en) | 1983-03-18 | 1984-03-05 | Receiver used for FM stereo broadcasting |
AT84901295T ATE63022T1 (en) | 1983-03-18 | 1984-03-05 | FM STEREO BROADCAST SYSTEM WITH S-CHANNEL COMPANDER. |
AU26911/84A AU568356B2 (en) | 1983-03-18 | 1984-03-05 | Fm stereophonic system incorporating companding of difference signals |
DE8484901295T DE3484495D1 (en) | 1983-03-18 | 1984-03-05 | FM STEREO BROADCASTING SYSTEM WITH S-CHANNEL COMPANDER. |
PCT/US1984/000340 WO1984003807A1 (en) | 1983-03-18 | 1984-03-05 | Fm stereophonic radio broadcasting system having s channel companding |
EP84901295A EP0138914B1 (en) | 1983-03-18 | 1984-03-05 | Fm stereophonic radio broadcasting system having s channel companding |
BR8406450A BR8406450A (en) | 1983-03-18 | 1984-03-05 | STEREOPHONIC MODULATED FREQUENCY RADIOTRANSMISSION SYSTEM |
CA000449410A CA1220527A (en) | 1983-03-18 | 1984-03-12 | Fm stereophonic system incorporating companding of difference signal |
IT47881/84A IT1178371B (en) | 1983-03-18 | 1984-03-16 | FREQUENCY MODULATION STEREOPHONE RADIO TRANSMISSION SYSTEM |
KR1019840001376A KR920002899B1 (en) | 1983-03-18 | 1984-03-17 | Fm stereophonic system incorporating companding of difference signal |
IL71286A IL71286A (en) | 1983-03-18 | 1984-03-18 | Fm stereophonic radio broadcasting system |
DK545284A DK165149C (en) | 1983-03-18 | 1984-11-16 | STEREOPHONIC FM RADIO TRANSMISSION SYSTEM WITH SELECTABLE COMPANDING |
NO844592A NO166307C (en) | 1983-03-18 | 1984-11-16 | STEREOPHONIC FM RADIO CASTING SYSTEM. |
JP1278341A JPH02168747A (en) | 1983-03-18 | 1989-10-25 | Transmitter for |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/476,738 US4485483A (en) | 1983-03-18 | 1983-03-18 | FM Stereophonic system incorporating companding of difference signal |
Publications (1)
Publication Number | Publication Date |
---|---|
US4485483A true US4485483A (en) | 1984-11-27 |
Family
ID=23893046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/476,738 Expired - Fee Related US4485483A (en) | 1983-03-18 | 1983-03-18 | FM Stereophonic system incorporating companding of difference signal |
Country Status (12)
Country | Link |
---|---|
US (1) | US4485483A (en) |
EP (1) | EP0138914B1 (en) |
JP (2) | JPS60500933A (en) |
KR (1) | KR920002899B1 (en) |
AU (1) | AU568356B2 (en) |
BR (1) | BR8406450A (en) |
CA (1) | CA1220527A (en) |
DE (1) | DE3484495D1 (en) |
DK (1) | DK165149C (en) |
IL (1) | IL71286A (en) |
IT (1) | IT1178371B (en) |
WO (1) | WO1984003807A1 (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986004201A1 (en) * | 1985-01-04 | 1986-07-17 | Cbs Inc. | Broadcast stereo companding system and apparatus |
US4602381A (en) * | 1985-01-04 | 1986-07-22 | Cbs Inc. | Adaptive expanders for FM stereophonic broadcasting system utilizing companding of difference signal |
US4602380A (en) * | 1985-01-04 | 1986-07-22 | Cbs Inc. | Compatible transmission techniques for FM stereophonic radio and television |
US4704727A (en) * | 1985-11-27 | 1987-11-03 | Beard Terry D | Low noise and distortion FM transmission system and method |
US4751734A (en) * | 1987-06-01 | 1988-06-14 | Broadcast Technology Partners | Receiver for FM stereophonic broadcasting system utilizing circuits for reducing effects of multipath |
US4752955A (en) * | 1987-03-25 | 1988-06-21 | Broadcast Technology Partners | FM stereophonic system having improved compatibility in presence of multipath |
US4769841A (en) * | 1987-07-09 | 1988-09-06 | Broadcast Technology Partners | Receiver for compatible FM stereophonic system utilizing companding of difference signal |
US4771464A (en) * | 1986-01-30 | 1988-09-13 | Broadcast Technology Partners | FM stereophonic broadcasting system utilizing simultaneous companding and modulation/demodulation |
US4817151A (en) * | 1987-11-09 | 1989-03-28 | Broadcast Technology Partners | Selective decoder for compatible FM stereophonic system utilizing companding of difference signal |
US4827515A (en) * | 1987-08-26 | 1989-05-02 | Deutsche Itt Industries Gmbh | Digital demodulator |
US4852167A (en) * | 1987-01-20 | 1989-07-25 | Sanyo Electric Co., Ltd. | FMX stereophonic receiver |
US4916741A (en) * | 1987-03-27 | 1990-04-10 | Sanyo Electric Co., Ltd. | FM/FMX stereophonic receiver |
DE4027399A1 (en) * | 1990-08-30 | 1992-03-12 | Blaupunkt Werke Gmbh | FM CAR RADIO |
US5103480A (en) * | 1989-08-16 | 1992-04-07 | Victor Company Of Japan | FMX identification signal detection apparatus |
US5119503A (en) * | 1991-02-19 | 1992-06-02 | Mankovitz Roy J | Apparatus and methods for broadcasting auxiliary data in an FM stereo broadcast system |
US5134719A (en) * | 1991-02-19 | 1992-07-28 | Mankovitz Roy J | Apparatus and methods for identifying broadcast audio program selections in an FM stereo broadcast system |
US5202924A (en) * | 1989-12-22 | 1993-04-13 | Allegro Microsystems, Inc. | Stereo FM radio receiver with variable band pass stereo decoder |
US5278909A (en) * | 1992-06-08 | 1994-01-11 | International Business Machines Corporation | System and method for stereo digital audio compression with co-channel steering |
US5349386A (en) * | 1991-03-07 | 1994-09-20 | Recoton Corporation | Wireless signal transmission systems, methods and apparatus |
US5825320A (en) * | 1996-03-19 | 1998-10-20 | Sony Corporation | Gain control method for audio encoding device |
US5960390A (en) * | 1995-10-05 | 1999-09-28 | Sony Corporation | Coding method for using multi channel audio signals |
US5974379A (en) * | 1995-02-27 | 1999-10-26 | Sony Corporation | Methods and apparatus for gain controlling waveform elements ahead of an attack portion and waveform elements of a release portion |
WO1999067894A2 (en) * | 1998-06-22 | 1999-12-29 | Doron Shalev | Two-way wireless communication between a group of devices |
US6064699A (en) * | 1997-07-07 | 2000-05-16 | Golden Eagle Electronics Manufactory Ltd. | Wireless speaker system for transmitting analog and digital information over a single high-frequency channel |
US6088349A (en) * | 1994-07-14 | 2000-07-11 | Grundig Ag | Method, transmitter and receiver for the transmission and selection of local radio programs in a common-wave broadcasting network |
US8929558B2 (en) | 2009-09-10 | 2015-01-06 | Dolby International Ab | Audio signal of an FM stereo radio receiver by using parametric stereo |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2690582B1 (en) * | 1992-04-22 | 1994-06-17 | Ratia Joel | ELECTRONIC DEVICE FOR TRANSMITTING AUDIO OR OTHER INFORMATION USING THE ELECTRICAL DISTRIBUTION NETWORK AS A VECTOR. |
KR100977198B1 (en) * | 2008-12-29 | 2010-08-20 | (주)해네임 | Apparatus and method for detecting phase difference between amplitude modulation signal and frequency modulation signal |
EP2477418B1 (en) * | 2011-01-12 | 2014-06-04 | Nxp B.V. | Signal processing method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3067292A (en) * | 1958-02-03 | 1962-12-04 | Jerry B Minter | Stereophonic sound transmission and reproduction |
GB1093961A (en) * | 1964-01-29 | 1967-12-06 | Emi Ltd | Improvements relating to stereophonic transmission systems and receivers therefor |
US4016366A (en) * | 1974-07-17 | 1977-04-05 | Sansui Electric Co., Ltd. | Compatible stereophonic receiver |
US4338491A (en) * | 1980-06-04 | 1982-07-06 | Motorola Inc. | Compatible AM stereophonic system |
US4376916A (en) * | 1980-05-29 | 1983-03-15 | Cbs Inc. | Signal compression and expansion system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1160038B (en) * | 1960-01-26 | 1963-12-27 | Grundig Max | Method and device for the transmission of two or more signals |
DE2051034C3 (en) * | 1970-10-17 | 1978-11-02 | Hessischer Rundfunk, 6000 Frankfurt | VHF radio stereophonic transmission system |
-
1983
- 1983-03-18 US US06/476,738 patent/US4485483A/en not_active Expired - Fee Related
-
1984
- 1984-03-05 BR BR8406450A patent/BR8406450A/en not_active IP Right Cessation
- 1984-03-05 DE DE8484901295T patent/DE3484495D1/en not_active Expired - Lifetime
- 1984-03-05 WO PCT/US1984/000340 patent/WO1984003807A1/en active IP Right Grant
- 1984-03-05 EP EP84901295A patent/EP0138914B1/en not_active Expired - Lifetime
- 1984-03-05 AU AU26911/84A patent/AU568356B2/en not_active Ceased
- 1984-03-05 JP JP59501292A patent/JPS60500933A/en active Granted
- 1984-03-12 CA CA000449410A patent/CA1220527A/en not_active Expired
- 1984-03-16 IT IT47881/84A patent/IT1178371B/en active
- 1984-03-17 KR KR1019840001376A patent/KR920002899B1/en not_active IP Right Cessation
- 1984-03-18 IL IL71286A patent/IL71286A/en not_active IP Right Cessation
- 1984-11-16 DK DK545284A patent/DK165149C/en not_active IP Right Cessation
-
1989
- 1989-10-25 JP JP1278341A patent/JPH02168747A/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3067292A (en) * | 1958-02-03 | 1962-12-04 | Jerry B Minter | Stereophonic sound transmission and reproduction |
GB1093961A (en) * | 1964-01-29 | 1967-12-06 | Emi Ltd | Improvements relating to stereophonic transmission systems and receivers therefor |
US4016366A (en) * | 1974-07-17 | 1977-04-05 | Sansui Electric Co., Ltd. | Compatible stereophonic receiver |
US4376916A (en) * | 1980-05-29 | 1983-03-15 | Cbs Inc. | Signal compression and expansion system |
US4338491A (en) * | 1980-06-04 | 1982-07-06 | Motorola Inc. | Compatible AM stereophonic system |
Non-Patent Citations (8)
Title |
---|
A/B Field Tests of Stereophonic Broadcasting Systems, United States of America, CCIR Document X/149 E, 5/7/69, pp. 1 11. * |
A/B Field Tests of Stereophonic Broadcasting Systems, United States of America, CCIR Document X/149-E, 5/7/69, pp. 1-11. |
Fockens et al., "A Quadraphonic FM Broadcasting System Incorporating Pilot-Controlled Compression and Pre-Emphasis", IEEE Transactions on Consumer Electronics, vol. CE-22, No. 1, pp. 84-93, Feb. 1976. |
Fockens et al., A Quadraphonic FM Broadcasting System Incorporating Pilot Controlled Compression and Pre Emphasis , IEEE Transactions on Consumer Electronics, vol. CE 22, No. 1, pp. 84 93, Feb. 1976. * |
Recommendations and Reports of the CCIR (1982), vol. X, Part 1, Report #300-5, Paragraph 3.3. |
Recommendations and Reports of the CCIR (1982), vol. X, Part 1, Report 300 5, Paragraph 3.3. * |
Stereophonic Broadcasting, European Broadcasting Union, CCIR Document X/42 E, 2/23/65, Part Three, pp. 10 12. * |
Stereophonic Broadcasting, European Broadcasting Union, CCIR Document X/42-E, 2/23/65, Part Three, pp. 10-12. |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4602381A (en) * | 1985-01-04 | 1986-07-22 | Cbs Inc. | Adaptive expanders for FM stereophonic broadcasting system utilizing companding of difference signal |
US4602380A (en) * | 1985-01-04 | 1986-07-22 | Cbs Inc. | Compatible transmission techniques for FM stereophonic radio and television |
WO1986004201A1 (en) * | 1985-01-04 | 1986-07-17 | Cbs Inc. | Broadcast stereo companding system and apparatus |
AU578792B2 (en) * | 1985-01-04 | 1988-11-03 | Btp International | Broadcast stereo companding system and apparatus |
US4704727A (en) * | 1985-11-27 | 1987-11-03 | Beard Terry D | Low noise and distortion FM transmission system and method |
US4771464A (en) * | 1986-01-30 | 1988-09-13 | Broadcast Technology Partners | FM stereophonic broadcasting system utilizing simultaneous companding and modulation/demodulation |
US4852167A (en) * | 1987-01-20 | 1989-07-25 | Sanyo Electric Co., Ltd. | FMX stereophonic receiver |
US4752955A (en) * | 1987-03-25 | 1988-06-21 | Broadcast Technology Partners | FM stereophonic system having improved compatibility in presence of multipath |
US4916741A (en) * | 1987-03-27 | 1990-04-10 | Sanyo Electric Co., Ltd. | FM/FMX stereophonic receiver |
US4751734A (en) * | 1987-06-01 | 1988-06-14 | Broadcast Technology Partners | Receiver for FM stereophonic broadcasting system utilizing circuits for reducing effects of multipath |
US4769841A (en) * | 1987-07-09 | 1988-09-06 | Broadcast Technology Partners | Receiver for compatible FM stereophonic system utilizing companding of difference signal |
US4827515A (en) * | 1987-08-26 | 1989-05-02 | Deutsche Itt Industries Gmbh | Digital demodulator |
US4817151A (en) * | 1987-11-09 | 1989-03-28 | Broadcast Technology Partners | Selective decoder for compatible FM stereophonic system utilizing companding of difference signal |
US5103480A (en) * | 1989-08-16 | 1992-04-07 | Victor Company Of Japan | FMX identification signal detection apparatus |
US5202924A (en) * | 1989-12-22 | 1993-04-13 | Allegro Microsystems, Inc. | Stereo FM radio receiver with variable band pass stereo decoder |
DE4027399A1 (en) * | 1990-08-30 | 1992-03-12 | Blaupunkt Werke Gmbh | FM CAR RADIO |
US5119503A (en) * | 1991-02-19 | 1992-06-02 | Mankovitz Roy J | Apparatus and methods for broadcasting auxiliary data in an FM stereo broadcast system |
US5134719A (en) * | 1991-02-19 | 1992-07-28 | Mankovitz Roy J | Apparatus and methods for identifying broadcast audio program selections in an FM stereo broadcast system |
USRE40836E1 (en) | 1991-02-19 | 2009-07-07 | Mankovitz Roy J | Apparatus and methods for providing text information identifying audio program selections |
US5349386A (en) * | 1991-03-07 | 1994-09-20 | Recoton Corporation | Wireless signal transmission systems, methods and apparatus |
US5278909A (en) * | 1992-06-08 | 1994-01-11 | International Business Machines Corporation | System and method for stereo digital audio compression with co-channel steering |
US6088349A (en) * | 1994-07-14 | 2000-07-11 | Grundig Ag | Method, transmitter and receiver for the transmission and selection of local radio programs in a common-wave broadcasting network |
US5974379A (en) * | 1995-02-27 | 1999-10-26 | Sony Corporation | Methods and apparatus for gain controlling waveform elements ahead of an attack portion and waveform elements of a release portion |
US5960390A (en) * | 1995-10-05 | 1999-09-28 | Sony Corporation | Coding method for using multi channel audio signals |
US5825320A (en) * | 1996-03-19 | 1998-10-20 | Sony Corporation | Gain control method for audio encoding device |
US6064699A (en) * | 1997-07-07 | 2000-05-16 | Golden Eagle Electronics Manufactory Ltd. | Wireless speaker system for transmitting analog and digital information over a single high-frequency channel |
WO1999067894A2 (en) * | 1998-06-22 | 1999-12-29 | Doron Shalev | Two-way wireless communication between a group of devices |
WO1999067894A3 (en) * | 1998-06-22 | 2000-02-24 | Doron Shalev | Two-way wireless communication between a group of devices |
US8929558B2 (en) | 2009-09-10 | 2015-01-06 | Dolby International Ab | Audio signal of an FM stereo radio receiver by using parametric stereo |
US9877132B2 (en) | 2009-09-10 | 2018-01-23 | Dolby International Ab | Audio signal of an FM stereo radio receiver by using parametric stereo |
Also Published As
Publication number | Publication date |
---|---|
JPS60500933A (en) | 1985-06-20 |
EP0138914A4 (en) | 1986-06-11 |
JPH02168747A (en) | 1990-06-28 |
IT8447881A0 (en) | 1984-03-16 |
AU2691184A (en) | 1984-10-09 |
IT1178371B (en) | 1987-09-09 |
DK165149C (en) | 1993-03-01 |
KR840008240A (en) | 1984-12-13 |
EP0138914A1 (en) | 1985-05-02 |
JPH0216068B2 (en) | 1990-04-16 |
AU568356B2 (en) | 1987-12-24 |
DK545284A (en) | 1984-11-16 |
BR8406450A (en) | 1985-03-12 |
IT8447881A1 (en) | 1985-09-16 |
WO1984003807A1 (en) | 1984-09-27 |
CA1220527A (en) | 1987-04-14 |
IL71286A (en) | 1987-10-20 |
KR920002899B1 (en) | 1992-04-06 |
DK165149B (en) | 1992-10-12 |
DE3484495D1 (en) | 1991-05-29 |
DK545284D0 (en) | 1984-11-16 |
IL71286A0 (en) | 1984-06-29 |
JPH0559620B2 (en) | 1993-08-31 |
EP0138914B1 (en) | 1991-04-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NATIONAL ASSOCIATION OF BROADCASTERS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KELLER, THOMAS B.;REEL/FRAME:004584/0764 Effective date: 19860729 |
|
AS | Assignment |
Owner name: CBS INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TORICK, EMIL L.;REEL/FRAME:004609/0561 Effective date: 19860922 Owner name: CBS INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TORICK, EMIL L.;REEL/FRAME:004609/0561 Effective date: 19860922 |
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